Abstract
Preliminary results of an EXOSAT observation of the transient X-ray source 4U 154.3-47 are presented. The source was observed in August 1983, during a high state, following a Tenma alert that the source was again active. Results from the GSPC and the LE 1000 1/mm grating are presented. The spectrum is complex, but in the 2-10 keV energy range can be well described by a Comptonised thermal distribution. Extrapolating the same model into the lower energy band of the grating requires an absorption column density equivalent to 2x1021 H cm2. A marked under-abundance of Oxygen and overabundance of Nitrogen, along with a strong, unidentified line feature at 9.8 A, are necessary to model the grating data.
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References
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© 1985 D. Reidel Publishing Company
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Chiappetti, L., White, N.E., Kahn, S.M., Shafer, R. (1985). High and Medium Resolution Spectroscopy of the X-Ray Transient 4U1543-47. In: Peacock, A. (eds) X-Ray Astronomy in the Exosat Era. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5448-9_26
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DOI: https://doi.org/10.1007/978-94-009-5448-9_26
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-8906-7
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